爆力运搬理论的修正及其应用

An Corrections on the Theory of Blasting Force Driven Ore Conveyance and Its Application

爆力运矿采矿法具有采切比小、矿石损失贫化少、经济效益好等优点。前苏联佛氏提出的爆力运距计算公式虽沿用至今,但存在着一定的局限性,导致计算结果比实际运距明显偏大,有时出现负值。为了使计算结果更接近实际,保证爆力运搬的可靠性,对佛氏公式有关参数进行了修正。经修正后的公式曾在现场爆力运搬中进行检验,结果认为对减少采切工程量,提高回采率有明显效果。

In the mining system which conveys ore by blasting force, the ratio of mined tonnage to development is low and the ore dilution and loss are less, leading to good cost effectiveness. The calculation formula, put forward by the former USSR expert B.A. Sherkanov, for the conveyance distance of ore by blasting force, has been in use up to date. However, the inherent limitation of the formula tends to give results obviously greater than the actual conveyance distance and some times give negative values. In order to allow the calculations to approach to actual results so as to assure the reliability of blasting force driven ore conveyance, some parameters used in the formula are corrected and the revised formula has been validated in a field test, indicating that the development work has been greatly reduced and the mining efficiency greatly enhanced.